BQ24190: Problems that can not be charged from the PC

K.Shidara

Expert 3225 points

Part Number: BQ24190

Hi Team

My customer is facing the problem that can not be charged from the PC.

And my customer understood below 2 IC functions from the datasheet.

The conditions for entering the HIZ state are

・ USB Input source is USB Host (SDP 100mA)

・ Battery voltage VBAT> VBATGD (3.55V)

When IC enters HIZ, sleep mode close to shutdown.

Then the customer asked and requested below, Please advise,

1. When BQ24190 is in host mode, please explain the relationship between the timing when INT is set and the timing when entering HIZ.

2. Is the timing when bit is set in REG [00] 7 after HIZ state?

3. What are the timing constraints for detecting INT from Host and releasing HIZ?

4.Please send the entire state transition diagram and timing chart of BQ24190.

If the BQ24190 is in host mode, the HIZ state is kept even if the USB plug is removed. Is the following understanding correct?

1. Even if the USB plug is unplugged, the HIZ state keeps and INT level doesn't change (no interrupt)

2. Since the HIZ state is kept even if the AC adapter (that is, DCP) is inserted next time, INT level does not change.

Thanks

Best regards,

Shidara

over 6 years ago

0 Ning T over 6 years ago

TI__Guru 57341 points

Shidara,

Are you sure the device is in HIZ mode?

1.What are the test conditions such as VBUS, VBAT, VSYS, ISYS when not charging?

2.What are all the register values when the behavior happens?

Thanks,

Ning.

0 K.Shidara over 6 years ago in reply to Ning T

TI__Expert 3225 points

Hi Ning-san

Thanks for your support. Please find the conditions below,

1 Test conditions when charging is not possible

VBUS 5V
VBAT 3.56V ~ 3.6V
SYS * 3V (setting value)
ISYS * 256mA (Although it is set, charging has not started)

2 Register when a problem occurs (hex)
REG00 b8
REG01 1b
REG02 31
REG03 10
REG04 a7
REG05 0c
REG06 03
REG07 4b
REG08 -
REG09 00
REG0A 23

Thanks

Best regards,

Shidara

0 K.Shidara over 5 years ago in reply to K.Shidara

TI__Expert 3225 points

Hi Ning-san

Could you advise about this?

Thanks

Best regards,

Shidara

0 Ning T over 5 years ago in reply to K.Shidara

TI__Guru 57341 points

Shidara,

What is REG08 value which is the most important?

Did the host enable HIZ via I2C?

Thanks,

Ning.

0 Ning T over 5 years ago in reply to Ning T

TI__Guru 57341 points

Hi,

We haven’t heard back from you for a while, the thread is considered solved and closed.

Thanks,

Ning.

0 K.Shidara over 5 years ago in reply to Ning T

TI__Expert 3225 points

Hi Ning-san

I requested to provide it to the customer .

Would you wait a little?

Thanks

Best regards

Shidara

0 Ning T over 5 years ago in reply to K.Shidara

TI__Guru 57341 points

Shidara,

The thread has been quite for a while. It is considered solved and closed. Please start a new thread if needed.

Thanks,

Ning.

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BQ24190: Problems that can not be charged from the PC